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HomeMy WebLinkAboutMarkup SummaryMarkup Summary Subject: Approved - Planning Page Index: 1 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf L_RSD Transportation Expansion_DOC_250521_v3.pdf (16) Subject: Cloud+ Page Index: 18 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 19 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 20 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 21 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 22 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 23 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 24 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 25 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf CORRECTIONS - RESUBMIT 06/12/2025 HBray DEVELOPMENT ENGINEERING DIVISION www.ContechES.com/filterra | 800-338-112212 Maintenance Checklist Filterra Inspection & Maintenance LogFilterra System Size/Model: _____________________________Location: ____________________________________________ Drainage System Failure Problem Conditions to CheckCondition that Should Exist ActionsInletExcessive sediment or trash accumulation.Accumulated sediments or trash impair free flow of water into Filterra.Inlet should be free of obstructions allowing free distributed flow of water into Filterra.Sediments and/or trash should be removed. Mulch CoverTrash and floatable debris accumulation.Excessive trash and/or debris accumulation.Minimal trash or other debris on mulch cover.Trash and debris should be removed and mulch cover raked level. Ensure bark nugget mulch is not used. Mulch Cover“Ponding” of water on mulch cover.“Ponding” in unit could be indicative of clogging due to excessive fine sediment accumulation or spill of petroleum oils.Stormwater should drain freely and evenly through mulch cover.Recommend contact manufacturer and replace mulch as a minimum. VegetationPlants not growing or in poor condition.Soil/mulch too wet, evidence of spill. Incorrect plant selection. Pest infestation. Vandalism to plants.Plants should be healthy and pest free.Contact manufacturer for advice. Vegetation Plant growth excessive.Plants should be appropriate to the species and location of Filterra.Trim/prune plants in accordance with typical landscaping and safety needs.StructureStructure has visible cracks.Cracks wider than 1/2 inch or evidence of soil particles entering the structure through the cracks.Vault should be repaired.Maintenance is ideally to be performed twice annually. DateMulch & Debris RemovedDepth of Mulch Added Mulch BrandHeight of Vegetation Above GrateVegetation Species Issues with System Comments1/1/175 – 5 gal Buckets 3”Lowe’s Premium Brown Mulch4’Galaxy Magnolia - Standing water in downstream structure- Removed blockage in downstream structure Page 5 of 18 of39 www.ContechES.com/filterra | 800-338-112212 Maintenance Checklist Filterra Inspection & Maintenance LogFilterra System Size/Model: _____________________________Location: ____________________________________________ Drainage System FailureProblemConditions to CheckCondition that Should Exist ActionsInletExcessive sediment or trash accumulation.Accumulated sediments or trash impair free flow of water into Filterra.Inlet should be free of obstructions allowing free distributed flow of water into Filterra.Sediments and/or trash should be removed.Mulch CoverTrash and floatable debris accumulation.Excessive trash and/or debris accumulation.Minimal trash or other debris on mulch cover.Trash and debris should be removed and mulch cover raked level. Ensure bark nugget mulch is not used. Mulch Cover“Ponding” of water on mulch cover.“Ponding” in unit could be indicative of clogging due to excessive fine sediment accumulation or spill of petroleum oils.Stormwater should drain freely and evenly through mulch cover.Recommend contact manufacturer and replace mulch as a minimum.Vegetation Plants not growing or in poor condition.Soil/mulch too wet, evidence of spill. Incorrect plant selection. Pest infestation. Vandalism to plants.Plants should be healthy and pest free.Contact manufacturer for advice. Vegetation Plant growth excessive.Plants should be appropriate to the species and location of Filterra.Trim/prune plants in accordance with typical landscaping and safety needs.StructureStructure has visible cracks.Cracks wider than 1/2 inch or evidence of soil particles entering the structure through the cracks.Vault should be repaired.Maintenance is ideally to be performed twice annually. DateMulch & Debris RemovedDepth of Mulch AddedMulch BrandHeight of Vegetation Above GrateVegetation SpeciesIssues with System Comments1/1/175 – 5 gal Buckets 3”Lowe’s Premium Brown Mulch 4’Galaxy Magnolia- Standing water in downstream structure- Removed blockage in downstream structure www.ContechES.com/filterra | 800-338-1122 please enlarge fontto 8 point size orlarger as requiredby state law www.ContechES.com/filterra | 800-338-1122 13 Filterra Activation Package | Page 1* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® The Filterra system will be (or has been) delivered to you with protection in place to resist intrusion of construction related sediment which can contaminate the biofiltration media and result in inadequate system performance. These protection devices are intended as a best practice and cannot fully prevent contamination. It is the purchaser’s responsibility to provide adequate measures to prevent construction related runoff from entering the Filterra system.Included with your purchase is Activation of the Filterra system by the manufacturer as well as a 1-year warranty from delivery of the system and a Final Site Assessment (assessment of unit condition, mulch replacement, debris removal, and pruning of vegetation) scheduled between 6 months and 1 year after Activation, upon request.Activation of the Filterra system is a procedure completed by the manufacturer to place the system into working condition. This involves the following items:• Removal of construction runoff protection devices• Planting of the system’s vegetation (provided by the purchaser)• Placement of pretreatment mulch layer using mulch acceptable for use in Filterra systems. Activation MUST be provided by the manufacturer to ensure proper site conditions are met for Activation, proper installation of the vegetation, and use of pretreatment mulch acceptable for use in Filterra systems. The purchaser should request Activation from Contech after the site is stabilized, but prior to turning over the site to the owner. Please allow 1-2 weeks to schedule Activation.The purchaser must ensure that the site is acceptable for Filterra Activation. A checklist (included as page 3 of this document must be completed and submitted to the Contech Activation Coordinator. The minimum 4 requirements for Filterra Activation are as follows: 1. The purchaser must have sourced vegetation meeting the requirements outlined in “Plant Selection for Filterra Systems” starting on page 4 of this document. FILTERRA® VAULT ACTIVATION PACKAGE ENGINEERED SOLUTIONS Appendix 1 – Filterra® Vault Activation Package Page 5 of 19 of39 www.ContechES.com/filterra | 800-338-1122 13Filterra Activation Package | Page 1* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® The Filterra system will be (or has been) delivered to you with protection in place to resist intrusion of construction related sediment which can contaminate the biofiltration media and result in inadequate system performance. These protection devices are intended as a best practice and cannot fully prevent contamination. It is the purchaser’s responsibility to provide adequate measures to prevent construction related runoff from entering the Filterra system.Included with your purchase is Activation of the Filterra system by the manufacturer as well as a 1-year warranty from delivery of the system and a Final Site Assessment (assessment of unit condition, mulch replacement, debris removal, and pruning of vegetation) scheduled between 6 months and 1 year after Activation, upon request.Activation of the Filterra system is a procedure completed by the manufacturer to place the system into working condition. This involves the following items:• Removal of construction runoff protection devices• Planting of the system’s vegetation (provided by the purchaser)• Placement of pretreatment mulch layer using mulch acceptable for use in Filterra systems. Activation MUST be provided by the manufacturer to ensure proper site conditions are met for Activation, proper installation of the vegetation, and use of pretreatment mulch acceptable for use in Filterra systems. The purchaser should request Activation from Contech after the site is stabilized, but prior to turning over the site to the owner. Please allow 1-2 weeks to schedule Activation.The purchaser must ensure that the site is acceptable for Filterra Activation. A checklist (included as page 3 of this document must be completed and submitted to the Contech Activation Coordinator. The minimum 4 requirements for Filterra Activation are as follows: 1. The purchaser must have sourced vegetation meeting the requirements outlined in “Plant Selection for Filterra Systems” starting on page 4 of this document. FILTERRA® VAULT ACTIVATION PACKAGE ENGINEERED SOLUTIONS Appendix 1 – Filterra® Vault Activation Package www.ContechES.com/filterra | 800-338-1122 please enlarge fontto 8 point size orlarger as requiredby state law 2. The site landscaping must be fully stabilized, i.e. full landscaping installed and some grass cover (not just straw and seed) is required to reduce sediment transport. Construction debris and materials should be removed from surrounding area. 3. Final paving must be completed. Final paving ensures that paving materials will not enter and contaminate the Filterra system during the paving process, and that the plant will receive runoff from the drainage area, assisting with plant survival for the Filterra system. 4. Where curb inlets are included as part of the Filterra system, Filterra throat opening should be at least 4” clear in order to ensure adequate capacity for inflow and debris. www.ContechES.com/filterra | 800-338-112214 Filterra Activation Package | Page 2* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® 2. The site landscaping must be fully stabilized, i.e. full landscaping installed and some grass cover (not just straw and seed) is required to reduce sediment transport. Construction debris and materials should be removed from surrounding area. 3. Final paving must be completed. Final paving ensures that paving materials will not enter and contaminate the Filterra system during the paving process, and that the plant will receive runoff from the drainage area, assisting with plant survival for the Filterra system. 4. Where curb inlets are included as part of the Filterra system, Filterra throat opening should be at least 4” clear in order to ensure adequate capacity for inflow and debris. www.ContechES.com/filterra | 800-338-1122 * UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested bycustomer where Contech determines that the site does not meet the conditions required for Activation AND/ORacceptable plants are not provided by the contractor. ONLY Contech authorized representatives can performActivation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturersupplied activation and final inspection. Filterra Activation Package | Page 2® please enlarge fontto 8 point size orlarger as requiredby state law www.ContechES.com/filterra | 800-338-1122 15 Filterra Activation Package | Page 3* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® Filterra® Vault Activation ChecklistProject Name: ________________________________________Company: ______________________________________________Site Contact Name: _______________________________________Site Contact Phone/Email: ____________________________ Site Owner/End User Name: _________________________Site Owner/End User Phone/Email: ____________________________Preferred Activation Date: ___________________________________(provide 2 weeks minimum from date this form is submitted)Site DesignationTop Opening Type Final Pavement Complete Landscaping Complete / Grass EmergingConstruction materials / Piles / Debris RemovedThroat Opening Measures 4” Min. Height (where applicable)Vegetation Sourced by Contractor Tree Grate Full Grate (No tree opening) Bioscape Vault (Open Planter)  Verified Verified Verified  Verified  Species on FT Plant List Container Grown (15 gal. max) 4’ Tall Min. (Tree grate units only)____ Qty provided Tree Grate Full Grate (No tree opening) Bioscape Vault (Open Planter)  Verified Verified Verified  Verified  Species on FT Plant List Container Grown (15 gal. max) 4’ Tall Min. (Tree grate units only)____ Qty provided Tree Grate Full Grate (No tree opening) Bioscape Vault (Open Planter)  Verified Verified Verified  Verified  Species on FT Plant List Container Grown (15 gal. max) 4’ Tall Min. (Tree grate units only)____ Qty provided Tree Grate Full Grate (No tree opening) Bioscape Vault (Open Planter)  Verified Verified Verified  Verified  Species on FT Plant List Container Grown (15 gal. max) 4’ Tall Min. (Tree grate units only)____ Qty providedNOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. Attach additional sheets as necessary. Signature Date ENGINEERED SOLUTIONS Page 5 of 21 of39 Filterra Activation Package | Page 3* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® Filterra® Vault Activation ChecklistProject Name: ________________________________________Company: ______________________________________________Site Contact Name: _______________________________________Site Contact Phone/Email: ____________________________ Site Owner/End User Name: _________________________Site Owner/End User Phone/Email: ____________________________Preferred Activation Date: ___________________________________(provide 2 weeks minimum from date this form is submitted)Site DesignationTop Opening Type Final Pavement CompleteLandscaping Complete / Grass EmergingConstruction materials / Piles / Debris Removed Throat Opening Measures 4” Min. Height (where applicable)Vegetation Sourced by Contractor Tree Grate Full Grate (No tree opening) Bioscape Vault (Open Planter)  Verified  Verified Verified Verified  Species on FT Plant List Container Grown (15 gal. max) 4’ Tall Min. (Tree grate units only)____ Qty provided Tree Grate Full Grate (No tree opening) Bioscape Vault (Open Planter)  Verified  Verified Verified Verified  Species on FT Plant List Container Grown (15 gal. max) 4’ Tall Min. (Tree grate units only)____ Qty provided Tree Grate Full Grate (No tree opening) Bioscape Vault (Open Planter)  Verified  Verified Verified Verified  Species on FT Plant List Container Grown (15 gal. max) 4’ Tall Min. (Tree grate units only)____ Qty provided Tree Grate Full Grate (No tree opening) Bioscape Vault (Open Planter)  Verified  Verified Verified Verified  Species on FT Plant List Container Grown (15 gal. max) 4’ Tall Min. (Tree grate units only)____ Qty provided NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. Attach additional sheets as necessary. Signature Date ENGINEERED SOLUTIONS * UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested bycustomer where Contech determines that the site does not meet the conditions required for Activation AND/ORacceptable plants are not provided by the contractor. ONLY Contech authorized representatives can performActivation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturersupplied activation and final inspection. www.ContechES.com/filterra | 800-338-1122 vations will void the system war Filterra Activation Package | Page 3®please enlarge fontto 8 point size orlarger as requiredby state law Planting Selection for Filterra® Vault Systems All Filterra systems require vegetation for proper long-term performance. As indicated in the Activation Package, the Contractor is responsible for sourcing the proper vegetation prior to Activation. Contech or a Contech representative will install the vegetation during the Activation process. Contractors should identify the Top Opening style for each Filterra requiring Activation on the Activation Checklist. Contech offers three types, which are detailed on page 5 of this document:• Vault with Tree Grate• Vault with Full Grate• Bioscape / Open PlanterContractors must ensure the vegetation meets the following 4 requirements:1. Select plant(s) as specified in the engineering plans and specifications AND that are listed on Contech’s Configuration Specific Plant Lists**. 2. All plants MUST be container-grown in nursery containers no larger than 15 gallons. Crated and/or Ball/Burlap plants are NOT permitted.3. For Vaults with Tree Grates, plant height must be 4’ Minimum, from soil surface to top of plant.4. Provide plant quantities per the following guidance:• Vault with Tree Grate – 1 per Tree Grate• Vault with Full Grate – 4-5 Small or Extra Small Grasses per Full Grate• Bioscape – Quantities should be selected based on plant palette options found starting on page 6 of this document.If Contech or Contech’s representative shows up for Activation and any of the 4 requirements above are not met, Activation cannot be performed and the Contractor will be billed a $1,500 Unprepared Site fee*. Some additional vegetation recommendations for the best possible Activation and Installation are as follows:• Select plant(s) with full root development but not to the point where root bound.• For Filterra systems with a Tree Grate, select plants with taller trunks. Lower branches can be pruned away provided there are sufficient branches above the grate for tree or shrub development.• For Filterra systems with a Tree Grate, plant(s) should have a single trunk at installation.• Plant species shall not have a mature height greater than 30 feet.** In some cases, Contech may consider alternate plant species as approved by the Product Manager. Please list the plant name in the space below and submit this sheet to your Contech Activation Coordinator. If the plant species is approved, either the Product Manager or the Activation Coordinator will sign the form and return to you for inclusion with your Activation Checklist. Requested Plant Species: ___________________________________________Approved: _______________________________Date: ____________________________________Filterra Activation Package | Page 4* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® Planting Selection for Filterra® Vault Systems All Filterra systems require vegetation for proper long-term performance. As indicated in the Activation Package, the Contractor is responsible for sourcing the proper vegetation prior to Activation. Contech or a Contech representative will install the vegetation during the Activation process. Contractors should identify the Top Opening style for each Filterra requiring Activation on the Activation Checklist. Contech offers three types, which are detailed on page 5 of this document:• Vault with Tree Grate• Vault with Full Grate• Bioscape / Open PlanterContractors must ensure the vegetation meets the following 4 requirements:1. Select plant(s) as specified in the engineering plans and specifications AND that are listed on Contech’s Configuration Specific Plant Lists**. 2. All plants MUST be container-grown in nursery containers no larger than 15 gallons. Crated and/or Ball/Burlap plants are NOT permitted.3. For Vaults with Tree Grates, plant height must be 4’ Minimum, from soil surface to top of plant.4. Provide plant quantities per the following guidance:• Vault with Tree Grate – 1 per Tree Grate• Vault with Full Grate – 4-5 Small or Extra Small Grasses per Full Grate• Bioscape – Quantities should be selected based on plant palette options found starting on page 6 of this document.If Contech or Contech’s representative shows up for Activation and any of the 4 requirements above are not met, Activation cannot be performed and the Contractor will be billed a $1,500 Unprepared Site fee*. Some additional vegetation recommendations for the best possible Activation and Installation are as follows:• Select plant(s) with full root development but not to the point where root bound.• For Filterra systems with a Tree Grate, select plants with taller trunks. Lower branches can be pruned away provided there are sufficient branches above the grate for tree or shrub development.• For Filterra systems with a Tree Grate, plant(s) should have a single trunk at installation.• Plant species shall not have a mature height greater than 30 feet.** In some cases, Contech may consider alternate plant species as approved by the Product Manager. Please list the plant name in the space below and submit this sheet to your Contech Activation Coordinator. If the plant species is approved, either the Product Manager or the Activation Coordinator will sign the form and return to you for inclusion with your Activation Checklist. Requested Plant Species: ___________________________________________Approved: _______________________________Date: ____________________________________ * UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested bycustomer where Contech determines that the site does not meet the conditions required for Activation AND/ORacceptable plants are not provided by the contractor. ONLY Contech authorized representatives can performActivation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer please enlarge fontto 8 point size orlarger as requiredby state law www.ContechES.com/filterra | 800-338-1122 17 Filterra Activation Package | Page 5* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® Figure 1a. Filterra with Tree Grate Drawing Figure 2a. Filterra with Full Grate Drawing Figure 3a. Filterra Bioscape Vault Drawing Figure 1b. Filterra with Tree Grate Photo (not yet planted) Figure 2b. Filterra with Full Grate Photo Figure 3b. Filterra Bioscape Vault Photo Filterra® Top Opening Examples Filterra® Vault with Tree Grate Filterra® Vault with Full Grate Filterra® Bioscape Vault Page 5 of 23 of39www.ContechES.com/filterra | 800-338-1122 Filterra Activation Package | Page 5* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® Figure 1a. Filterra with Tree Grate Drawing Figure 2a. Filterra with Full Grate Drawing Figure 3a. Filterra Bioscape Vault Drawing Figure 1b. Filterra with Tree Grate Photo (not yet planted) Figure 2b. Filterra with Full Grate Photo Figure 3b. Filterra Bioscape Vault Photo Filterra® Top Opening Examples Filterra® Vault with Tree Grate Filterra® Vault with Full Grate Filterra® Bioscape Vault * UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested bycustomer where Contech determines that the site does not meet the conditions required for Activation AND/ORacceptable plants are not provided by the contractor. ONLY Contech authorized representatives can performActivation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturersupplied activation and final inspection. Filterra Activation Package | Page 5® please enlarge fontto 8 point size orlarger as requiredby state law. pleasealso ensure text isclear - some is fuzzyon this page Filterra Activation Package | Page 6* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® Filterra® Bioscape Vault Plant PalettesKEY: (refer to plant lists for species sizing) 4x4 Media BayA.3A.5 A.6A.6 A.9 A.12 A.15 A. 20 B. 6 C. 3 D. 2 B.1B.2 B.2B.2 B.3 B.3 B.4 C.1C.1 C.1 D.1D.1 D.1 D.1 D.1 C.1 C.2 C.2 C.2 4x6/6x4 Media Bay 4x8/8x4 &4.5x7.83/7.83x4.5 Media Bay6x6 Media Bay 6x8/8x6 Media Bay 6x10/10x6 & 8x8 Media Bay 6x12/12x6 Media Bay 7x13/13x7/12x8 &14x8 Media Bay A. EXTRA SMALL GRASS• Up to 2’ mature spread• 1-2 gallon typical (1 gal. minimum)B. SMALL GRASS/SHRUB• 2’-4’ mature spread• 1-7 gallon typicalC. MEDIUM SHRUB• 4’-6’ mature spread• 1-7 gallon typicalD. LARGE SHRUB OR EXTRA LARGE SHRUB OR TREE• 6’ mature spread and greater, 30’ max. mature height• Up to 15 gallon maximum NOTE: For larger vaults and in-ground Filterra Bioscape systems, palettes can be scaled (i.e. Qty 6 of the 22x8 Palette can be used for a 1056 sf Filterra Bioscape).MIX & MATCH SUBSTITUTION OPTIONS:1 Large Shrub or Extra Large Shrub or Tree• 2 Medium Shrubs• 4 Small Grass/SHrubs• 12 Extra Small Grasses1 Medium Shrub• 2 Small Grass/Shrubs• 6 Extra Small Grasses1 Small Grass/Shrub• 3 Extra Small Grasses Page 5 of 24 of39www.ContechES.com/filterra | 800-338-1122 * UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested bycustomer where Contech determines that the site does not meet the conditions required for Activation AND/ORacceptable plants are not provided by the contractor. ONLY Contech authorized representatives can performActivation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturersupplied activation and final inspection. please enlarge fontto 8 point size orlarger as requiredby state law. pleasealso ensure text isclear Filterra Activation Package | Page 7* UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested by customer where Contech determines that the site does not meet the conditions required for Activation AND/OR acceptable plants are not provided by the contractor. ONLY Contech authorized representatives can perform Activation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturer supplied activation and final inspection. ® A. 24 A. 28 A. 32 A. 36 B. 8 B. 8 B. 10 B. 10 C. 4 C. 4 C. 5 C. 5 D. 2 D. 2 D. 3 D. 3 16x8 & 15x9 Media Bay 18x8 Media Bay 20x8 Media Bay 22x8 Media Bay Page 5 of 25 of39www.ContechES.com/filterra | 800-338-1122 * UNPREPARED SITE FEE NOTE: A charge of $1500.00 will be invoiced for each activation visit requested bycustomer where Contech determines that the site does not meet the conditions required for Activation AND/ORacceptable plants are not provided by the contractor. ONLY Contech authorized representatives can performActivation of Filterra systems; unauthorized activations will void the system warranty and waive manufacturersupplied activation and final inspection. please enlarge fontto 8 point size orlarger as requiredby state law. pleasealso ensure text isclear Subject: Cloud+ Page Index: 32 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 33 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 34 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 35 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 36 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 37 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf Subject: Cloud+ Page Index: 38 Color: File Name: L_RSD Transportation Expansion_DOC_250521_v3.pdf 2 CDS® Using patented continuous deflective separation technology, the CDS system screens, separates and traps debris, sediment, and oil and grease from stormwater runoff. The indirect screening capability of the system allows for 100% removal of floatables and neutrally buoyant material without blinding. Flow and screening controls physically separate captured solids, and minimize the re-suspension and release of previously trapped pollutants. Inline units can treat up to 6 cfs, and internally bypass flows in excess of 50 cfs (1416 L/s). Available precast or cast-in-place, offline units can treat flows from 1 to 300 cfs (28.3 to 8495 L/s). The pollutant removal capacity of the CDS system has been proven in lab and field testing. Operation OverviewStormwater enters the diversion chamber where the diversion weir guides the flow into the unit’s separation chamber and pollutants are removed from the flow. All flows up to the system’s treatment design capacity enter the separation chamber and are treated.Swirl concentration and screen deflection force floatables and solids to the center of the separation chamber where 100% of floatables and neutrally buoyant debris larger than the screen apertures are trapped.Stormwater then moves through the separation screen, under the oil baffle and exits the system. The separation screen remains clog free due to continuous deflection.During the flow events exceeding the treatment design capacity, the diversion weir bypasses excessive flows around the separation chamber, so captured pollutants are retained in the separation cylinder. Design BasicsThere are three primary methods of sizing a CDS system. The Water Quality Flow Rate Method determines which model size provides the desired removal efficiency at a given flow rate for a defined particle size. The Rational Rainfall Method™ or the and Probabilistic Method is used when a specific removal efficiency of the net annual sediment load is required.Typically in the Unites States, CDS systems are designed to achieve an 80% annual solids load reduction based on lab generated performance curves for a gradation with an average particle size (d50) of 125 microns (μm). For some regulatory environments, CDS systems can also be designed to achieve an 80% annual solids load reduction based on an average particle size (d50) of 75 microns (μm) or 50 microns (μm).Water Quality Flow Rate MethodIn some cases, regulations require that a specific treatment rate, often referred to as the water quality design flow (WQQ), be treated. This WQQ represents the peak flow rate from either an event with a specific recurrence interval, e.g. the six-month storm, or a water quality depth, e.g. 1/2-inch (13 mm) of rainfall.The CDS is designed to treat all flows up to the WQQ. At influent rates higher than the WQQ, the diversion weir will direct most flow exceeding the WQQ around the separation chamber. This allows removal efficiency to remain relatively constant in the separation chamber and eliminates the risk of washout during bypass flows regardless of influent flow rates.Treatment flow rates are defined as the rate at which the CDS will remove a specific gradation of sediment at a specific removal efficiency. Therefore the treatment flow rate is variable, based on the gradation and removal efficiency specified by the design engineer.Rational Rainfall Method™Differences in local climate, topography and scale make every site hydraulically unique. It is important to take these factors into consideration when estimating the long-term performance of any stormwater treatment system. The Rational Rainfall Method combines site-specific information with laboratory generated performance data, and local historical precipitation records to estimate removal efficiencies as accurately as possible.Short duration rain gauge records from across the United States and Canada were analyzed to determine the percent of the total annual rainfall that fell at a range of intensities. US stations’ depths were totaled every 15 minutes, or hourly, and recorded in 0.01-inch increments. Depths were recorded hourly with 1-mm resolution at Canadian stations. One trend was consistent at all sites; the vast majority of precipitation fell at low intensities and high intensity storms contributed relatively little to the total annual depth.These intensities, along with the total drainage area and runoff coefficient for each specific site, are translated into flow rates using the Rational Rainfall Method. Since most sites are relatively small and highly impervious, the Rational Rainfall Method is appropriate. Based on the runoff flow rates calculated for each intensity, operating rates within a proposed CDS system are GRATE INLET(CAST IRON HOOD FORCURB INLET OPENING) CREST OF BYPASS WEIR(ONE EACH SIDE) INLET(MULTIPLE PIPES POSSIBLE)OIL BAFFLE SUMP STORAGESEPARATION SLABTREATMENT SCREENOUTLET INLET FLUMESEPARATION CYLINDER CLEAN OUT(REQUIRED)DEFLECTION PAN, 3 SIDED(GRATE INLET DESIGN) 39Page 5 of 28 of Page 5 of 30 of 39 PDF 1/23 © 2023 Contech Engineered Solutions LLC, a QUIKRETE Company 9100 Centre Pointe Drive, Suite 400West Chester, OH 45069info@conteches.com | 800-338-1122www.ContechES.com ALL RIGHTS RESERVED. PRINTED IN THE USA. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. ®Bioretention Systems ENGINEERED SOLUTIONS NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONSSUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWNEVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OFSUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER,EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, ORPRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY ANDALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AREDISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE ATWWW.CONTECHES.COM/COS) FOR MORE INFORMATION. © 2023 Contech Engineered Solutions LLC, a QUIKRETE CompanyALL RIGHTS RESERVED. PRINTED IN THE USA. 39Page 5 of 28 of Page 5 of 32 of 39 2 CDS® Using patented continuous deflective separation technology, the CDS system screens, separates and traps debris, sediment, and oil and grease from stormwater runoff. The indirect screening capability of the system allows for 100% removal of floatables and neutrally buoyant material without blinding. Flow and screening controls physically separate captured solids, and minimize the re-suspension and release of previously trapped pollutants. Inline units can treat up to 6 cfs, and internally bypass flows in excess of 50 cfs (1416 L/s). Available precast or cast-in-place, offline units can treat flows from 1 to 300 cfs (28.3 to 8495 L/s). The pollutant removal capacity of the CDS system has been proven in lab and field testing. Operation OverviewStormwater enters the diversion chamber where the diversion weir guides the flow into the unit’s separation chamber and pollutants are removed from the flow. All flows up to the system’s treatment design capacity enter the separation chamber and are treated.Swirl concentration and screen deflection force floatables and solids to the center of the separation chamber where 100% of floatables and neutrally buoyant debris larger than the screen apertures are trapped.Stormwater then moves through the separation screen, under the oil baffle and exits the system. The separation screen remains clog free due to continuous deflection.During the flow events exceeding the treatment design capacity, the diversion weir bypasses excessive flows around the separation chamber, so captured pollutants are retained in the separation cylinder. Design BasicsThere are three primary methods of sizing a CDS system. The Water Quality Flow Rate Method determines which model size provides the desired removal efficiency at a given flow rate for a defined particle size. The Rational Rainfall Method™ or the and Probabilistic Method is used when a specific removal efficiency of the net annual sediment load is required.Typically in the Unites States, CDS systems are designed to achieve an 80% annual solids load reduction based on lab generated performance curves for a gradation with an average particle size (d50) of 125 microns (μm). For some regulatory environments, CDS systems can also be designed to achieve an 80% annual solids load reduction based on an average particle size (d50) of 75 microns (μm) or 50 microns (μm).Water Quality Flow Rate MethodIn some cases, regulations require that a specific treatment rate, often referred to as the water quality design flow (WQQ), be treated. This WQQ represents the peak flow rate from either an event with a specific recurrence interval, e.g. the six-month storm, or a water quality depth, e.g. 1/2-inch (13 mm) of rainfall.The CDS is designed to treat all flows up to the WQQ. At influent rates higher than the WQQ, the diversion weir will direct most flow exceeding the WQQ around the separation chamber. This allows removal efficiency to remain relatively constant in the separation chamber and eliminates the risk of washout during bypass flows regardless of influent flow rates.Treatment flow rates are defined as the rate at which the CDS will remove a specific gradation of sediment at a specific removal efficiency. Therefore the treatment flow rate is variable, based on the gradation and removal efficiency specified by the design engineer.Rational Rainfall Method™Differences in local climate, topography and scale make every site hydraulically unique. It is important to take these factors into consideration when estimating the long-term performance of any stormwater treatment system. The Rational Rainfall Method combines site-specific information with laboratory generated performance data, and local historical precipitation records to estimate removal efficiencies as accurately as possible.Short duration rain gauge records from across the United States and Canada were analyzed to determine the percent of the total annual rainfall that fell at a range of intensities. US stations’ depths were totaled every 15 minutes, or hourly, and recorded in 0.01-inch increments. Depths were recorded hourly with 1-mm resolution at Canadian stations. One trend was consistent at all sites; the vast majority of precipitation fell at low intensities and high intensity storms contributed relatively little to the total annual depth.These intensities, along with the total drainage area and runoff coefficient for each specific site, are translated into flow rates using the Rational Rainfall Method. Since most sites are relatively small and highly impervious, the Rational Rainfall Method is appropriate. Based on the runoff flow rates calculated for each intensity, operating rates within a proposed CDS system are GRATE INLET(CAST IRON HOOD FORCURB INLET OPENING)CREST OF BYPASS WEIR(ONE EACH SIDE) INLET(MULTIPLE PIPES POSSIBLE)OIL BAFFLESUMP STORAGESEPARATION SLABTREATMENT SCREENOUTLET INLET FLUMESEPARATION CYLINDER CLEAN OUT(REQUIRED)DEFLECTION PAN, 3 SIDED(GRATE INLET DESIGN) please enlarge textsize to 8 point fontsize or larger 3 determined. Performance efficiency curve determined from full scale laboratory tests on defined sediment PSDs is applied to calculate solids removal efficiency. The relative removal efficiency at each operating rate is added to produce a net annual pollutant removal efficiency estimate.Probabilistic Rational MethodThe Probabilistic Rational Method is a sizing program Contech developed to estimate a net annual sediment load reduction for a particular CDS model based on site size, site runoff coefficient, regional rainfall intensity distribution, and anticipated pollutant characteristics.The Probabilistic Method is an extension of the Rational Method used to estimate peak discharge rates generated by storm events of varying statistical return frequencies (e.g. 2-year storm event). Under the Rational Method, an adjustment factor is used to adjust the runoff coefficient estimated for the 10-year event, correlating a known hydrologic parameter with the target storm event. The rainfall intensities vary depending on the return frequency of the storm event under consideration. In general, these two frequency dependent parameters (rainfall intensity and runoff coefficient) increase as the return frequency increases while the drainage area remains constant.These intensities, along with the total drainage area and runoff coefficient for each specific site, are translated into flow rates using the Rational Method. Since most sites are relatively small and highly impervious, the Rational Method is appropriate. Based on the runoff flow rates calculated for each intensity, operating rates within a proposed CDS are determined. Performance efficiency curve on defined sediment PSDs is applied to calculate solids removal efficiency. The relative removal efficiency at each operating rate is added to produce a net annual pollutant removal efficiency estimate.Treatment Flow RateThe inlet throat area is sized to ensure that the WQQ passes through the separation chamber at a water surface elevation equal to the crest of the diversion weir. The diversion weir bypasses excessive flows around the separation chamber, thus preventing re-suspension or re-entrainment of previously captured particles.Hydraulic CapacityThe hydraulic capacity of a CDS system is determined by the length and height of the diversion weir and by the maximum allowable head in the system. Typical configurations allow hydraulic capacities of up to ten times the treatment flow rate. The crest of the diversion weir may be lowered and the inlet throat may be widened to increase the capacity of the system at a given water surface elevation. The unit is designed to meet project specific hydraulic requirements.PerformanceFull-Scale Laboratory Test ResultsA full-scale CDS system (Model CDS2020-5B) was tested at the facility of University of Florida, Gainesville, FL. This CDS unit was evaluated under controlled laboratory conditions of influent flow rate and addition of sediment. Two different gradations of silica sand material (UF Sediment & OK-110) were used in the CDS performance evaluation. The particle size distributions (PSDs) of the test materials were analyzed using standard method “Gradation ASTM D-422 “Standard Test Method for Particle-Size Analysis of Soils” by a certified laboratory. UF Sediment is a mixture of three different products produced by the U.S. Silica Company: “Sil-Co-Sil 106”, “#1 DRY” and “20/40 Oil Frac”. Particle size distribution analysis shows that the UF Sediment has a very fine gradation (d50 = 20 to 30 μm) covering a wide size range (Coefficient of Uniformity, C averaged at 10.6). In comparison with the hypothetical TSS gradation specified in the NJDEP (New Jersey Department of Environmental Protection) and NJCAT (New Jersey Corporation for Advanced Technology) protocol for lab testing, the UF Sediment covers a similar range of particle size but with a finer d50 (d50 for NJDEP is approximately 50 μm) (NJDEP, 2003). The OK-110 silica sand is a commercial product of U.S. Silica Sand. The particle size distribution analysis of this material, also included in Figure 1, shows that 99.9% of the OK-110 sand is finer than 250 microns, with a mean particle size (d50) of 106 microns. The PSDs for the test material are shown in Figure 1. Figure 1. Particle size distributionsTests were conducted to quantify the performance of a specific CDS unit (1.1 cfs (31.3-L/s) design capacity) at various flow rates, ranging from 1% up to 125% of the treatment design capacity of the unit, using the 2400 micron screen. All tests were conducted with controlled influent concentrations of approximately 200 mg/L. Effluent samples were taken at equal time intervals across the entire duration of each test run. These samples were then processed with a Dekaport Cone sample splitter to obtain representative sub-samples for Suspended Sediment Concentration (SSC) testing using ASTM D3977-97 “Standard Test Methods for Determining Sediment Concentration in Water Samples”, and particle size distribution analysis. Results and ModelingBased on the data from the University of Florida, a performance model was developed for the CDS system. A regression analysis was used to develop a fitting curve representative of the scattered data points at various design flow rates. This model, which demonstrated good agreement with the laboratory data, can then be used to predict CDS system performance with respect Page 5 of 30 of 39 PDF 1/23 © 2023 Contech Engineered Solutions LLC, a QUIKRETE Company 9100 Centre Pointe Drive, Suite 400West Chester, OH 45069info@conteches.com | 800-338-1122www.ContechES.com ALL RIGHTS RESERVED. PRINTED IN THE USA. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. ®Bioretention Systems ENGINEERED SOLUTIONS NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONSSUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWNEVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OFSUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER,EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, ORPRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY ANDALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AREDISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE ATWWW.CONTECHES.COM/COS) FOR MORE INFORMATION. © 2023 Contech Engineered Solutions LLC, a QUIKRETE CompanyALL RIGHTS RESERVED. PRINTED IN THE USA. 39Page 5 of 28 of Page 5 of 33 of 39 3 determined. Performance efficiency curve determined from full scale laboratory tests on defined sediment PSDs is applied to calculate solids removal efficiency. The relative removal efficiency at each operating rate is added to produce a net annual pollutant removal efficiency estimate.Probabilistic Rational MethodThe Probabilistic Rational Method is a sizing program Contech developed to estimate a net annual sediment load reduction for a particular CDS model based on site size, site runoff coefficient, regional rainfall intensity distribution, and anticipated pollutant characteristics.The Probabilistic Method is an extension of the Rational Method used to estimate peak discharge rates generated by storm events of varying statistical return frequencies (e.g. 2-year storm event). Under the Rational Method, an adjustment factor is used to adjust the runoff coefficient estimated for the 10-year event, correlating a known hydrologic parameter with the target storm event. The rainfall intensities vary depending on the return frequency of the storm event under consideration. In general, these two frequency dependent parameters (rainfall intensity and runoff coefficient) increase as the return frequency increases while the drainage area remains constant.These intensities, along with the total drainage area and runoff coefficient for each specific site, are translated into flow rates using the Rational Method. Since most sites are relatively small and highly impervious, the Rational Method is appropriate. Based on the runoff flow rates calculated for each intensity, operating rates within a proposed CDS are determined. Performance efficiency curve on defined sediment PSDs is applied to calculate solids removal efficiency. The relative removal efficiency at each operating rate is added to produce a net annual pollutant removal efficiency estimate.Treatment Flow RateThe inlet throat area is sized to ensure that the WQQ passes through the separation chamber at a water surface elevation equal to the crest of the diversion weir. The diversion weir bypasses excessive flows around the separation chamber, thus preventing re-suspension or re-entrainment of previously captured particles.Hydraulic CapacityThe hydraulic capacity of a CDS system is determined by the length and height of the diversion weir and by the maximum allowable head in the system. Typical configurations allow hydraulic capacities of up to ten times the treatment flow rate. The crest of the diversion weir may be lowered and the inlet throat may be widened to increase the capacity of the system at a given water surface elevation. The unit is designed to meet project specific hydraulic requirements.PerformanceFull-Scale Laboratory Test ResultsA full-scale CDS system (Model CDS2020-5B) was tested at the facility of University of Florida, Gainesville, FL. This CDS unit was evaluated under controlled laboratory conditions of influent flow rate and addition of sediment. Two different gradations of silica sand material (UF Sediment & OK-110) were used in the CDS performance evaluation. The particle size distributions (PSDs) of the test materials were analyzed using standard method “Gradation ASTM D-422 “Standard Test Method for Particle-Size Analysis of Soils” by a certified laboratory. UF Sediment is a mixture of three different products produced by the U.S. Silica Company: “Sil-Co-Sil 106”, “#1 DRY” and “20/40 Oil Frac”. Particle size distribution analysis shows that the UF Sediment has a very fine gradation (d50 = 20 to 30 μm) covering a wide size range (Coefficient of Uniformity, C averaged at 10.6). In comparison with the hypothetical TSS gradation specified in the NJDEP (New Jersey Department of Environmental Protection) and NJCAT (New Jersey Corporation for Advanced Technology) protocol for lab testing, the UF Sediment covers a similar range of particle size but with a finer d50 (d50 for NJDEP is approximately 50 μm) (NJDEP, 2003). The OK-110 silica sand is a commercial product of U.S. Silica Sand. The particle size distribution analysis of this material, also included in Figure 1, shows that 99.9% of the OK-110 sand is finer than 250 microns, with a mean particle size (d50) of 106 microns. The PSDs for the test material are shown in Figure 1. Figure 1. Particle size distributionsTests were conducted to quantify the performance of a specific CDS unit (1.1 cfs (31.3-L/s) design capacity) at various flow rates, ranging from 1% up to 125% of the treatment design capacity of the unit, using the 2400 micron screen. All tests were conducted with controlled influent concentrations of approximately 200 mg/L. Effluent samples were taken at equal time intervals across the entire duration of each test run. These samples were then processed with a Dekaport Cone sample splitter to obtain representative sub-samples for Suspended Sediment Concentration (SSC) testing using ASTM D3977-97 “Standard Test Methods for Determining Sediment Concentration in Water Samples”, and particle size distribution analysis. Results and ModelingBased on the data from the University of Florida, a performance model was developed for the CDS system. A regression analysis was used to develop a fitting curve representative of the scattered data points at various design flow rates. This model, which demonstrated good agreement with the laboratory data, can then be used to predict CDS system performance with respect please enlarge textsize to 8 point fontsize or larger 4 to SSC removal for any particle size gradation, assuming the particles are inorganic sandy-silt. Figure 2 shows CDS predictive performance for two typical particle size gradations (NJCAT gradation and OK-110 sand) as a function of operating rate. Figure 2. CDS stormwater treatment predictive performance for various particle gradations as a function of operating rate. Many regulatory jurisdictions set a performance standard for hydrodynamic devices by stating that the devices shall be capable of achieving an 80% removal efficiency for particles having a mean particle size (d50) of 125 microns (e.g. Washington State Department of Ecology — WASDOE - 2008). The model can be used to calculate the expected performance of such a PSD (shown in Figure 3). The model indicates (Figure 4) that the CDS system with 2400 micron screen achieves approximately 80% removal at the design (100%) flow rate, for this particle size distribution (d50 = 125 μm). Figure 3. WASDOE PSD Figure 4. Modeled performance for WASDOE PSD. Maintenance The CDS system should be inspected at regular intervals and maintained when necessary to ensure optimum performance. The rate at which the system collects pollutants will depend more heavily on site activities than the size of the unit. For example, unstable soils or heavy winter sanding will cause the grit chamber to fill more quickly but regular sweeping of paved surfaces will slow accumulation. Inspection Inspection is the key to effective maintenance and is easily performed. Pollutant transport and deposition may vary from year to year and regular inspections will help ensure that the system is cleaned out at the appropriate time. At a minimum, inspections should be performed twice per year (e.g. spring and fall) however more frequent inspections may be necessary in climates where winter sanding operations may lead to rapid accumulations, or in equipment washdown areas. Installations should also be inspected more frequently where excessive amounts of trash are expected. The visual inspection should ascertain that the system components are in working order and that there are no blockages or obstructions in the inlet and separation screen. The inspection should also quantify the accumulation of hydrocarbons, trash, and sediment in the system. Measuring pollutant accumulation can be done with a calibrated dipstick, tape measure or other measuring instrument. If absorbent material is used for enhanced removal of hydrocarbons, the level of discoloration of the sorbent material should also be identified Page 5 of 30 of 39 PDF 1/23 © 2023 Contech Engineered Solutions LLC, a QUIKRETE Company 9100 Centre Pointe Drive, Suite 400West Chester, OH 45069info@conteches.com | 800-338-1122www.ContechES.com ALL RIGHTS RESERVED. PRINTED IN THE USA. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. ®Bioretention Systems ENGINEERED SOLUTIONS NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONSSUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWNEVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OFSUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER,EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, ORPRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY ANDALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AREDISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE ATWWW.CONTECHES.COM/COS) FOR MORE INFORMATION. © 2023 Contech Engineered Solutions LLC, a QUIKRETE CompanyALL RIGHTS RESERVED. PRINTED IN THE USA. 39Page 5 of 28 of Page 5 of 34 of 39 4 to SSC removal for any particle size gradation, assuming the particles are inorganic sandy-silt. Figure 2 shows CDS predictive performance for two typical particle size gradations (NJCAT gradation and OK-110 sand) as a function of operating rate. Figure 2. CDS stormwater treatment predictive performance for various particle gradations as a function of operating rate. Many regulatory jurisdictions set a performance standard for hydrodynamic devices by stating that the devices shall be capable of achieving an 80% removal efficiency for particles having a mean particle size (d50) of 125 microns (e.g. Washington State Department of Ecology — WASDOE - 2008). The model can be used to calculate the expected performance of such a PSD (shown in Figure 3). The model indicates (Figure 4) that the CDS system with 2400 micron screen achieves approximately 80% removal at the design (100%) flow rate, for this particle size distribution (d50 = 125 μm). Figure 3. WASDOE PSD Figure 4. Modeled performance for WASDOE PSD. Maintenance The CDS system should be inspected at regular intervals and maintained when necessary to ensure optimum performance. The rate at which the system collects pollutants will depend more heavily on site activities than the size of the unit. For example, unstable soils or heavy winter sanding will cause the grit chamber to fill more quickly but regular sweeping of paved surfaces will slow accumulation. Inspection Inspection is the key to effective maintenance and is easily performed. Pollutant transport and deposition may vary from year to year and regular inspections will help ensure that the system is cleaned out at the appropriate time. At a minimum, inspections should be performed twice per year (e.g. spring and fall) however more frequent inspections may be necessary in climates where winter sanding operations may lead to rapid accumulations, or in equipment washdown areas. Installations should also be inspected more frequently where excessive amounts of trash are expected. The visual inspection should ascertain that the system components are in working order and that there are no blockages or obstructions in the inlet and separation screen. The inspection should also quantify the accumulation of hydrocarbons, trash, and sediment in the system. Measuring pollutant accumulation can be done with a calibrated dipstick, tape measure or other measuring instrument. If absorbent material is used for enhanced removal of hydrocarbons, the level of discoloration of the sorbent material should also be identified please enlarge textsize to 8 point fontsize or larger 5 during inspection. It is useful and often required as part of an operating permit to keep a record of each inspection. A simple form for doing so is provided. Access to the CDS unit is typically achieved through two manhole access covers. One opening allows for inspection and cleanout of the separation chamber (cylinder and screen) and isolated sump. The other allows for inspection and cleanout of sediment captured and retained outside the screen. For deep units, a single manhole access point would allows both sump cleanout and access outside the screen. The CDS system should be cleaned when the level of sediment has reached 75% of capacity in the isolated sump or when an appreciable level of hydrocarbons and trash has accumulated. If absorbent material is used, it should be replaced when significant discoloration has occurred. Performance will not be impacted until 100% of the sump capacity is exceeded however it is recommended that the system be cleaned prior to that for easier removal of sediment. The level of sediment is easily determined by measuring from finished grade down to the top of the sediment pile. To avoid underestimating the level of sediment in the chamber, the measuring device must be lowered to the top of the sediment pile carefully. Particles at the top of the pile typically offer less resistance to the end of the rod than consolidated particles toward the bottom of the pile. Once this measurement is recorded, it should be compared to the as-built drawing for the unit to determine weather the height of the sediment pile off the bottom of the sump floor exceeds 75% of the total height of isolated sump. Cleaning Cleaning of a CDS systems should be done during dry weather conditions when no flow is entering the system. The use of a vacuum truck is generally the most effective and convenient method of removing pollutants from the system. Simply remove the manhole covers and insert the vacuum hose into the sump. The system should be completely drained down and the sump fully evacuated of sediment. The area outside the screen should also be cleaned out if pollutant build-up exists in this area. In installations where the risk of petroleum spills is small, liquid contaminants may not accumulate as quickly as sediment. However, the system should be cleaned out immediately in the event of an oil or gasoline spill. Motor oil and other hydrocarbons that accumulate on a more routine basis should be removed when an appreciable layer has been captured. To remove these pollutants, it may be preferable to use absorbent pads since they are usually less expensive to dispose than the oil/water emulsion that may be created by vacuuming the oily layer. Trash and debris can be netted out to separate it from the other pollutants. The screen should be cleaned to ensure it is free of trash and debris.Manhole covers should be securely seated following cleaning activities to prevent leakage of runoff into the system from above and also to ensure that proper safety precautions have been followed. Confined space entry procedures need to be followed if physical access is required. Disposal of all material removed from the CDS system should be done in accordance with local regulations. In many jurisdictions, disposal of the sediments may be handled in the same manner as the disposal of sediments removed from catch basins or deep sump manholes. Check your local regulations for specific requirements on disposal. Page 5 of 30 of 39 PDF 1/23 © 2023 Contech Engineered Solutions LLC, a QUIKRETE Company 9100 Centre Pointe Drive, Suite 400West Chester, OH 45069info@conteches.com | 800-338-1122www.ContechES.com ALL RIGHTS RESERVED. PRINTED IN THE USA. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. ®Bioretention Systems ENGINEERED SOLUTIONS NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONSSUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWNEVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OFSUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER,EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, ORPRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY ANDALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AREDISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE ATWWW.CONTECHES.COM/COS) FOR MORE INFORMATION. © 2023 Contech Engineered Solutions LLC, a QUIKRETE CompanyALL RIGHTS RESERVED. PRINTED IN THE USA. 39Page 5 of 28 of Page 5 of 35 of 39 5 during inspection. It is useful and often required as part of an operating permit to keep a record of each inspection. A simple form for doing so is provided. Access to the CDS unit is typically achieved through two manhole access covers. One opening allows for inspection and cleanout of the separation chamber (cylinder and screen) and isolated sump. The other allows for inspection and cleanout of sediment captured and retained outside the screen. For deep units, a single manhole access point would allows both sump cleanout and access outside the screen. The CDS system should be cleaned when the level of sediment has reached 75% of capacity in the isolated sump or when an appreciable level of hydrocarbons and trash has accumulated. If absorbent material is used, it should be replaced when significant discoloration has occurred. Performance will not be impacted until 100% of the sump capacity is exceeded however it is recommended that the system be cleaned prior to that for easier removal of sediment. The level of sediment is easily determined by measuring from finished grade down to the top of the sediment pile. To avoid underestimating the level of sediment in the chamber, the measuring device must be lowered to the top of the sediment pile carefully. Particles at the top of the pile typically offer less resistance to the end of the rod than consolidated particles toward the bottom of the pile. Once this measurement is recorded, it should be compared to the as-built drawing for the unit to determine weather the height of the sediment pile off the bottom of the sump floor exceeds 75% of the total height of isolated sump. Cleaning Cleaning of a CDS systems should be done during dry weather conditions when no flow is entering the system. The use of a vacuum truck is generally the most effective and convenient method of removing pollutants from the system. Simply remove the manhole covers and insert the vacuum hose into the sump. The system should be completely drained down and the sump fully evacuated of sediment. The area outside the screen should also be cleaned out if pollutant build-up exists in this area. In installations where the risk of petroleum spills is small, liquid contaminants may not accumulate as quickly as sediment. However, the system should be cleaned out immediately in the event of an oil or gasoline spill. Motor oil and other hydrocarbons that accumulate on a more routine basis should be removed when an appreciable layer has been captured. To remove these pollutants, it may be preferable to use absorbent pads since they are usually less expensive to dispose than the oil/water emulsion that may be created by vacuuming the oily layer. Trash and debris can be netted out to separate it from the other pollutants. The screen should be cleaned to ensure it is free of trash and debris.Manhole covers should be securely seated following cleaning activities to prevent leakage of runoff into the system from above and also to ensure that proper safety precautions have been followed. Confined space entry procedures need to be followed if physical access is required. Disposal of all material removed from the CDS system should be done in accordance with local regulations. In many jurisdictions, disposal of the sediments may be handled in the same manner as the disposal of sediments removed from catch basins or deep sump manholes. Check your local regulations for specific requirements on disposal. please enlarge textsize to 8 point fontsize or larger 6 Note: To avoid underestimating the volume of sediment in the chamber, carefully lower the measuring device to the top of the sediment pile. Finer silty particles at the top of the pile may be more difficult to feel with a measuring stick. These finer particles typically offer less resistance to the end of the rod than larger particles toward the bottom of the pile. CDS Model Diameter Distance from Water Surface to Top of Sediment PileSediment Storage Capacityftmftmy3m3CDS151530.9 3.0 0.9 0.5 0.4CDS201541.2 3.0 0.9 0.9 0.7CDS201551.5 3.0 0.9 1.3 1.0CDS202051.5 3.5 1.1 1.3 1.0CDS202551.5 4.0 1.2 1.3 1.0CDS302061.8 4.0 1.2 2.1 1.6CDS302561.8 4.0 1.2 2.1 1.6CDS303061.8 4.6 1.4 2.1 1.6CDS303561.8 5.0 1.5 2.1 1.6CDS403082.4 4.6 1.4 5.6 4.3CDS404082.4 5.7 1.7 5.6 4.3CDS404582.4 6.2 1.9 5.6 4.3CDS5640103.0 6.3 1.9 8.7 6.7CDS5653103.0 7.7 2.3 8.7 6.7CDS5668103.0 9.3 2.8 8.7 6.7CDS5678103.0 10.3 3.1 8.7 6.7Table 1: CDS Maintenance Indicators and Sediment Storage Capacities Page 5 of 30 of 39 PDF 1/23 © 2023 Contech Engineered Solutions LLC, a QUIKRETE Company 9100 Centre Pointe Drive, Suite 400West Chester, OH 45069info@conteches.com | 800-338-1122www.ContechES.com ALL RIGHTS RESERVED. PRINTED IN THE USA. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. ®Bioretention Systems ENGINEERED SOLUTIONS NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONSSUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWNEVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OFSUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER,EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, ORPRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY ANDALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AREDISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE ATWWW.CONTECHES.COM/COS) FOR MORE INFORMATION. © 2023 Contech Engineered Solutions LLC, a QUIKRETE CompanyALL RIGHTS RESERVED. PRINTED IN THE USA. 39Page 5 of 28 of Page 5 of 36 of 39 6 Note: To avoid underestimating the volume of sediment in the chamber, carefully lower the measuring device to the top of the sediment pile. Finer silty particles at the top of the pile may be more difficult to feel with a measuring stick. These finer particles typically offer less resistance to the end of the rod than larger particles toward the bottom of the pile. CDS Model Diameter Distance from Water Surface to Top of Sediment PileSediment Storage Capacityftmftmy3m3CDS151530.9 3.0 0.9 0.5 0.4CDS201541.2 3.0 0.9 0.9 0.7CDS201551.5 3.0 0.9 1.3 1.0CDS202051.5 3.5 1.1 1.3 1.0CDS202551.5 4.0 1.2 1.3 1.0CDS302061.8 4.0 1.2 2.1 1.6CDS302561.8 4.0 1.2 2.1 1.6CDS303061.8 4.6 1.4 2.1 1.6CDS303561.8 5.0 1.5 2.1 1.6CDS403082.4 4.6 1.4 5.6 4.3CDS404082.4 5.7 1.7 5.6 4.3CDS404582.4 6.2 1.9 5.6 4.3CDS5640103.0 6.3 1.9 8.7 6.7CDS5653103.0 7.7 2.3 8.7 6.7CDS5668103.0 9.3 2.8 8.7 6.7CDS5678103.0 10.3 3.1 8.7 6.7Table 1: CDS Maintenance Indicators and Sediment Storage Capacities please enlarge textsize to 8 point fontsize or larger 7 CDS Inspection & Maintenance LogCDS Model: Location: Water Floatable Describe Maintenance Date depth to Layer Maintenance Personnel Comments sediment1 Thickness2 Performed———————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————— 1. The water depth to sediment is determined by taking two measurements with a stadia rod: one measurement from the manhole opening to the top of the sediment pile and the other from the manhole opening to the water surface. If the difference between these measurements is less than the values listed in table 1 the system should be cleaned out. Note: to avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile.2. For optimum performance, the system should be cleaned out when the floating hydrocarbon layer accumulates to an appreciable thickness. In the event of an oil spill, the system should be cleaned immediately. Page 5 of 30 of 39 PDF 1/23 © 2023 Contech Engineered Solutions LLC, a QUIKRETE Company 9100 Centre Pointe Drive, Suite 400West Chester, OH 45069info@conteches.com | 800-338-1122www.ContechES.com ALL RIGHTS RESERVED. PRINTED IN THE USA. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. ®Bioretention Systems ENGINEERED SOLUTIONS NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONSSUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWNEVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OFSUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER,EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, ORPRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY ANDALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AREDISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE ATWWW.CONTECHES.COM/COS) FOR MORE INFORMATION. © 2023 Contech Engineered Solutions LLC, a QUIKRETE CompanyALL RIGHTS RESERVED. PRINTED IN THE USA. 39Page 5 of 28 of Page 5 of 37 of 39 7 CDS Inspection & Maintenance LogCDS Model: Location: Water Floatable Describe Maintenance Date depth to Layer Maintenance Personnel Comments sediment1 Thickness2 Performed———————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————— ———————————————————————————————————————————————————————————————————————————————————————————————————————————————————— 1. The water depth to sediment is determined by taking two measurements with a stadia rod: one measurement from the manhole opening to the top of the sediment pile and the other from the manhole opening to the water surface. If the difference between these measurements is less than the values listed in table 1 the system should be cleaned out. Note: to avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile.2. For optimum performance, the system should be cleaned out when the floating hydrocarbon layer accumulates to an appreciable thickness. In the event of an oil spill, the system should be cleaned immediately. 1. The water depth to sediment is determined by taking two measurements with a stadia rod: onemeasurement from the manhole opening to the top of the sediment pile and the other from themanhole opening to the water surface. If the difference between these measurements is less than the values listed in table 1 the system should be cleaned out. Note: to avoid underestimatingthe volume of sediment in the chamber, the measuring device must be carefully lowered to the topof the sediment pile.2. For optimum performance, the system should be cleaned out when the floating hydrocarbon layeraccumulates to an appreciable thickness. In the event of an oil spill, the system should be cleanedimmediately.please enlarge textsize to 8 point fontsize or larger SUPPORT• Drawings and specifications are available at www.ContechES.com.• Site-specific design support is available from our engineers. ©2017 Contech Engineered Solutions LLC, a QUIKRETE CompanyContech Engineered Solutions provides site solutions for the civil engineering industry. Contech’s portfolio includes bridges, drainage, sanitary sewer, earth stabilization and stormwater treatment products. For information on other Contech division offerings, visit www.ContechES.com or call 800.338.1122NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION.The product(s) described may be protected by one or more of the following US patents: 5,322,629; 5,624,576; 5,707,527; 5,759,415; 5,788,848; 5,985,157; 6,027,639; 6,350,374; 6,406,218; 6,641,720; 6,511,595; 6,649,048; 6,991,114; 6,998,038; 7,186,058; 7,296,692; 7,297,266; related foreign patents or other patents pending. 800-338-1122www.ContechES.com cds_manual 3/17 PDF ENGINEERED SOLUTIONS Page 5 of 30 of 39 PDF 1/23 © 2023 Contech Engineered Solutions LLC, a QUIKRETE Company 9100 Centre Pointe Drive, Suite 400West Chester, OH 45069info@conteches.com | 800-338-1122www.ContechES.com ALL RIGHTS RESERVED. PRINTED IN THE USA. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. ENGINEERED SOLUTIONS NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONSSUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWNEVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OFSUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER,EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, ORPRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY ANDALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AREDISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE ATWWW.CONTECHES.COM/COS) FOR MORE INFORMATION. © 2023 Contech Engineered Solutions LLC, a QUIKRETE CompanyALL RIGHTS RESERVED. PRINTED IN THE USA. 39Page 5 of 28 of Page 5 of 38 of 39 SUPPORT• Drawings and specifications are available at www.ContechES.com.• Site-specific design support is available from our engineers. ©2017 Contech Engineered Solutions LLC, a QUIKRETE CompanyContech Engineered Solutions provides site solutions for the civil engineering industry. Contech’s portfolio includes bridges, drainage, sanitary sewer, earth stabilization and stormwater treatment products. For information on other Contech division offerings, visit www.ContechES.com or call 800.338.1122NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION.The product(s) described may be protected by one or more of the following US patents: 5,322,629; 5,624,576; 5,707,527; 5,759,415; 5,788,848; 5,985,157; 6,027,639; 6,350,374; 6,406,218; 6,641,720; 6,511,595; 6,649,048; 6,991,114; 6,998,038; 7,186,058; 7,296,692; 7,297,266; related foreign patents or other patents pending. 800-338-1122www.ContechES.com cds_manual 3/17 PDF ENGINEERED SOLUTIONS ©2017 Contech Engineered Solutions LLC, a QUIKRETE CompanyContech Engineered Solutions provides site solutions for the civil engineering industry. Contech’s portfolio includes bridges,drainage, sanitary sewer, earth stabilization and stormwater treatment products. For information on other Contech divisionofferings, visit www.ContechES.com or call 800.338.1122 NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREINARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHERGUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTYWHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTSDISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OFFITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OFSALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. The product(s) described may be protected by one or more of the following US patents: 5,322,629; 5,624,576; 5,707,527;5,759,415; 5,788,848; 5,985,157; 6,027,639; 6,350,374; 6,406,218; 6,641,720; 6,511,595; 6,649,048; 6,991,114; 6,998,038;7,186,058; 7,296,692; 7,297,266; related foreign patents or other patents pending. please enlarge text sizeto 8 point font size orlarger